Original or Equivalent: Making the Call Line by Line
What “or equivalent” actually commits you to, who decides, the four tests that separate a real brand requirement from habit, and the six things to ask for before you compare an equivalent offer.
What does “or equivalent” mean in a purchase specification?
It means the buyer will accept a different brand and model, provided it does the same job to the same stated characteristics. The decision is the buyer’s, and it is made when the request for quotation goes out — not after the quotations come back.
The working rule: where function matters, open the item to equivalents; where fit matters, keep the brand requirement. A standalone consumable — cleaning chemical, packaging tape, a hand tool — is usually a good candidate. An item that goes into an existing assembly, has to match a manufacturer’s dimension, or sits inside a warranty — a spare part, a filter, a component inside a switchboard, a printer cartridge — usually is not.
Why this decision arrives sooner in Türkiye
For a company operating in Türkiye under a group standard written abroad, the equivalence question is rarely about saving money. It is about distribution. A brand that is a shelf item in Germany or the UK may have no importer in Türkiye at all, or one importer with a six-week lead time and a minimum order value. The specification was written where the brand was available; the purchase is happening where it is not.
This changes what a good answer looks like. The question is not “is there something cheaper?” but “what is actually obtainable here that meets the same written characteristics?” — and the honest version of that answer names the substitute, states the standard it meets, and states where it differs.
A brand requirement that cannot be sourced locally is not a quality control. It is a delay with a specification number on it.
Equivalent, alternative, compatible: three different claims
In everyday use the three words are interchangeable. In a quotation they are not, and the difference tells you what the supplier is actually promising:
| Word used | What it claims | What the buyer should do |
|---|---|---|
| Equivalent | Performs the same function to the same technical characteristics | The strongest claim. Ask for a characteristic-by-characteristic comparison; it can be checked. |
| Alternative | Meets the same need, but may not match in every respect | The loosest claim. Ask, in writing, exactly where it differs. |
| Compatible | Fits or works with a named product | Says nothing about durability, output or certification. Fit is not performance. |
If a supplier writes “alternative”, they are telling you a difference exists. If they write “equivalent”, they are claiming none does — and should be able to support that with a datasheet.
Who decides, and where it is written down
The buyer decides, item by item. The practical mechanism is a column in the RFQ item table headed “equivalent accepted?” with a yes or no against every line. Left blank, the decision passes to the suppliers by default: one prices the named brand, another prices a substitute, and the quotations you get back cannot be compared because they are not for the same goods.
The decision is per line, not per list. A single request can carry brand-locked lines and open lines side by side — that is the normal case, not a compromise.
Four tests for opening an item to equivalents
A brand name in a specification sometimes carries a real technical requirement and sometimes carries only habit. Four questions separate them:
| Test | Open to equivalents | Keep the brand requirement |
|---|---|---|
| Fit | The item works on its own | It goes into an existing system, housing or seat |
| Dimension and interface | Standard sizes (tape, sacks, cleaning chemicals, fasteners) | Manufacturer-specific dimension, thread, socket or seal |
| Warranty | No effect on any warranty | Equipment warranty is conditional on original parts or consumables |
| Certification | A certificate to the same standard is sufficient | A client, an audit or a specification names the brand itself |
All four open: an equivalent is almost always the right decision. Even one “keep”: the brand requirement stays. The price difference does not buy back the risk.
Six things to ask for with an equivalent offer
“It is cheaper” is not a comparison. To build one, ask the supplier for six things in the quotation itself:
- Brand and full model code of what is being offered — “equivalent supplied” with no model code makes comparison impossible.
- Which characteristics it is equivalent on — dimension, capacity, class, standard number.
- Where it differs, if it does — this is never volunteered unless it is asked for.
- Pack quantity — substitutes frequently come in a different pack size; the unit price can match while the case price does not.
- Documentation — declaration of conformity or a test report against the same standard.
- Stock and lead time in writing — availability is usually the real benefit of an equivalent, so it is the thing worth pinning down.
The costs that are not in the unit price
An equivalence decision taken on unit price alone tends to be wrong. The items that move the total:
| Cost driver | How it appears later |
|---|---|
| Pack quantity | Cases of 20 instead of 24; the quantity needed no longer divides, and the remainder sits in the store |
| Consumption rate | A lower-performing consumable is replaced more often; annual cost rises while unit cost falls |
| Fit and installation | A dimension that is close but not identical turns into labour or an adapter |
| Warranty | Where original parts are a condition, equipment cover can lapse |
| Two products for one job | Both sit on the shelf; stock counts and requests start to disagree |
None of these appear in a quotation. Whoever runs the comparison has to ask for them.
How to write it into a specification
Two forms work in private-sector purchasing. The first names no brand at all and gives characteristics: dimension, class, standard number, capacity. The second names a brand as a reference and opens the line to equivalents — in which case the characteristics the equivalent has to match must also be written, otherwise the requirement cannot be measured and cannot be enforced.
⚠ Public procurement is a separate subject. Whether a brand may be named in a technical specification, and on what terms an equivalent must be accepted, is set by the public procurement legislation of the country concerned — in Türkiye by its own public procurement law, and elsewhere by the local equivalent. This page describes private-sector purchasing. If you are buying as, or on behalf of, a public body, the rule that applies is the one in your own jurisdiction.
How we handle it
At AKSCO an equivalent is a continuity tool, not a discount tool. Where the brand on your list is scarce in the Turkish market or carries a long lead time, we do not close the line — we price both: the item as requested and the substitute, side by side, with the difference written out.
Every equivalent we propose carries the brand, the full model code, the characteristics it matches and the point where it differs. We do not send quotations that say “equivalent supplied” and leave it there. The decision stays with you.
Frequently Asked Questions
Is an equivalent always cheaper?
No, and price is often not the point. The main benefit is usually availability: if the named brand has no stock or a long lead time, an equivalent is what finishes the job on schedule. A price advantage is common as well, but unit price on its own is misleading — pack quantity, consumption rate and installation fit all have to be in the comparison before it means anything.
Can a supplier ship an equivalent without asking?
They should not. Acceptance of equivalents is the buyer’s decision and belongs in the quotation stage. A quotation offering a substitute should say so explicitly and give the brand and model code of what is being offered. A substitution made after the order, without notice, is grounds for rejection at goods-in.
What happens if we leave the “equivalent accepted?” column blank?
The decision passes to the suppliers. One prices the named brand, another prices a substitute, and because the quotations are for different goods they cannot be compared. Filling that column in, yes or no on every line, is the cheapest possible protection for the comparison.
Does accepting an equivalent affect the warranty?
The item keeps its own warranty from its supplier. The thing to check is the warranty on the equipment the item goes into: some manufacturers make original consumables or spare parts a condition of cover. Where equipment is still under warranty, read those terms before the equivalence decision, not after.
Our group specification names a brand that is not sold in Türkiye. What now?
This is the most common version of the problem here, and it is worth separating into two questions. First, what does the specification actually require — the brand, or the characteristics the brand was chosen for? Second, what meets those characteristics and is distributed in Türkiye? A substitute presented with its standard number, its matching characteristics and its differences stated is something a group technical authority can approve; “we could not find it” is not.
Which items should never be opened to equivalents?
Items that go into an existing system, carry a manufacturer-specific dimension or interface, or sit inside an equipment warranty. Typical examples: components inside a switchboard where the range has to match, machine spare parts, manufacturer-specific filters and seals, cartridges for equipment under warranty. In these the price difference does not cover the risk of a mismatch.
Related guides
Corporate Purchasing Process
Where the equivalence decision sits in the request-to-order flow.
Read moreCorporate Purchasing in Türkiye: A Practical Guide
How local sourcing works, and why distribution decides so much of it.
Read moreWhat Is MRO? Industrial Consumables Explained
The spend category where equivalence questions come up most often.
Read moreRequest a Quote
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